CVE-2025-55158

HIGHNVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.8 under NVD CVSS v3. EPSS exploit probability: 0.4%, top 72% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.8Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Vim is an open source, command line text editor. In versions from 9.1.1231 to before 9.1.1406, when processing nested tuples during Vim9 script import operations, an error during evaluation can trigger a double-free in Vim’s internal typed value (typval_T) management. Specifically, the clear_tv() function may attempt to free memory that has already been deallocated, due to improper lifetime handling in the handle_import / ex_import code paths. The vulnerability can only be triggered if a user explicitly opens and executes a specially crafted Vim script. This issue has been patched in version 9.1.1406.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
40(Track)
EG Risk 40/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity88% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
29%
KEV
Not listed

Published

August 11, 2025

Last Modified

August 12, 2025

Advisory Details (2)

Auto-updated Aug 27, 2026
Patch available. Sources: github_commit, github.
github Patch Available

A double-free was found in Vim >v9.1.1231 and < 9.1.1406 · Advisory · vim/vim · GitHub

https://github.com/vim/vim/security/advisories/GHSA-5fg8-wvx3-583x
github_commit

commit 9772025d24e9 (vim/vim)

Fix landed in vim/vim commit 9772025d24e9 — awaiting tagged release

https://github.com/vim/vim/commit/9772025d24e939fd84b85748ce35c26874c05775

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 8× in last 7d / 31× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 149 total refreshes for this CVE.

  1. 2026-09-19 15:42 UTCEPSS rescore
  2. 2026-09-18 19:27 UTCEPSS rescore
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  8. 2026-09-13 05:05 UTCOSV refresh
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  1. 2026-08-25 13:48 UTCEPSS rescore
  2. 2026-08-25 06:26 UTCOSV refresh
  3. 2026-08-24 14:16 UTCEPSS rescore
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  18. 2026-08-10 23:59 UTCEPSS rescore
  19. 2026-08-09 13:46 UTCEPSS rescore
  20. 2026-08-08 23:49 UTCOSV refresh
  21. 2026-08-08 16:36 UTCEPSS rescore
  22. 2026-08-07 16:26 UTCEPSS rescore
  23. 2026-08-06 13:46 UTCEPSS rescore
  24. 2026-08-05 19:16 UTCEPSS rescore
  25. 2026-08-04 15:09 UTCEPSS rescore
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  37. 2026-07-23 22:41 UTCOSV refresh
  38. 2026-07-23 14:18 UTCEPSS rescore
  39. 2026-07-23 02:59 UTCEG score recompute
  40. 2026-07-22 14:08 UTCEPSS rescore
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  61. 2026-07-06 17:21 UTCOSV refresh
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  70. 2026-06-30 23:22 UTCEPSS rescore
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  73. 2026-06-28 14:07 UTCEPSS rescore
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  75. 2026-06-28 04:55 UTCEPSS rescore

Frequently asked(5)

What is CVE-2025-55158?
CVE-2025-55158 is a high vulnerability published on August 11, 2025. Vim is an open source, command line text editor. In versions from 9.1.1231 to before 9.1.1406, when processing nested tuples during Vim9 script import operations, an error during evaluation can trigger a double-free in Vim’s internal typed value (typvalT) management. Specifically, the cleartv()…
When was CVE-2025-55158 disclosed?
CVE-2025-55158 was first published in the National Vulnerability Database on August 11, 2025, with the most recent update on August 12, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-55158 actively exploited?
CVE-2025-55158 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 71.2% of all scored CVEs.
What is the CVSS score of CVE-2025-55158?
CVE-2025-55158 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2025-55158?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-55158, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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